Fly more complex stuff than a basic 152/PA28; tailwheel, wobbly prop, floppy undercart, farm stripping ...
don't just spend as little as posisble in 150/152's and that sort of thing
Really, how can you say that? Or do you not pay for it yourself? Yes, I agree in principle but many of us live in reality, where it's a ball ache to get the hours in the very cheapest aircraft.
I think the question is how to spend the
time and not how much
money you would spend in 100hrs if you had it.